(x-7)(x+9)=0findx

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Solution for (x-7)(x+9)=0findx equation:


Simplifying
(x + -7)(x + 9) = 0findx

Reorder the terms:
(-7 + x)(x + 9) = 0findx

Reorder the terms:
(-7 + x)(9 + x) = 0findx

Multiply (-7 + x) * (9 + x)
(-7(9 + x) + x(9 + x)) = 0findx
((9 * -7 + x * -7) + x(9 + x)) = 0findx
((-63 + -7x) + x(9 + x)) = 0findx
(-63 + -7x + (9 * x + x * x)) = 0findx
(-63 + -7x + (9x + x2)) = 0findx

Combine like terms: -7x + 9x = 2x
(-63 + 2x + x2) = 0findx

Anything times zero is zero.
-63 + 2x + x2 = 0dfinx

Solving
-63 + 2x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-9 + -1x)(7 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {-9, 7}

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